According to Newton's second law of motion, if we we have a rigid, unchanging mass and we observe it accelerating, what must be happening?
Aa force is being applied to the mass
Ba force was once applied but is now not being applied
Cno force was or is being applied to the mass
Dthe mass MUST be changing
Aa force is being applied to the mass
Ba force was once applied but is now not being applied
Cno force was or is being applied to the mass
Dthe mass MUST be changing